CaltechAUTHORS
Published January 24, 2019 | Version Submitted
Discussion Paper Open

The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs

Creators

Abstract

After their successful first observing run (September 12, 2015 - January 12, 2016), the Advanced LIGO detectors were upgraded to increase their sensitivity for the second observing run (November 30, 2016 - August 26, 2017). The Advanced Virgo detector joined the second observing run on August 1, 2017. We discuss the updates that happened during this period in the GstLAL-based inspiral pipeline, which is used to detect gravitational waves from the coalescence of compact binaries both in low latency and an offline configuration. These updates include deployment of a zero-latency whitening filter to reduce the over-all latency of the pipeline by up to 32 seconds, incorporation of the Virgo data stream in the analysis, introduction of a single-detector search to analyze data from the periods when only one of the detectors is running, addition of new parameters to the likelihood ratio ranking statistic, increase in the parameter space of the search, and introduction of a template mass-dependent glitch-excision thresholding method.

Additional Information

LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation (NSF) and operates under cooperative agreement PHY-0757058. We would like to thank Tito Dal Canton for provinding helpful comments and suggestions. We would also like to thank Graham Woan for his help in the review of the O2 pipeline. SS was supported in part by the LIGO Laboratory and in part by the Eberly Research Funds of Penn State, The Pennsylvania State University, University Park, PA 16802, USA. DM, JC, PB, and DC were supported by the the NSF grant PHY-1607585. SC was supported by the research programme of the Netherlands Organisation for Scientific Research (NWO). HF was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). CH was supported in part by the NSF through PHY-1454389. Funding for this project was provided by the Charles E. Kaufman Foundation of The Pittsburgh Foundation. TGFL was partially supported by a grant from the Research Grants Council of the Hong Kong (Project No. CUHK 14310816 and CUHK 24304317) and the Direct Grant for Research from the Research Committee of the Chinese University of Hong Kong. AG acknowledges support from NSF Grants AST-1716394 and AST-1708146. MW was supported by NSF grant PHY-1607178. This paper carries LIGO Document Number ligo-p1700411.

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Additional details

Identifiers

Eprint ID
95141
Resolver ID
CaltechAUTHORS:20190501-135953792

Related works

Describes
http://arxiv.org/abs/1901.08580 (URL)

Funding

NSF
PHY-0757058
LIGO Laboratory
Pennsylvania State University
NSF
PHY-1607585
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
Natural Sciences and Engineering Research Council of Canada (NSERC)
NSF
PHY-1454389
Charles E. Kaufman Foundation
Pittsburgh Foundation
Research Grants Council of Hong Kong
CUHK 14310816
Research Grants Council of Hong Kong
CUHK 24304317
Chinese University of Hong Kong
NSF
AST-1716394
NSF
AST-1708146

Dates

Created
2019-05-01
Created from EPrint's datestamp field
Updated
2020-03-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
LIGO
Other Numbering System Name
LIGO Document
Other Numbering System Identifier
P1700411